Question 1

How do I lower the total interest I pay on a loan?

Accepted Answer

Three levers dominate: a lower interest rate (shop lenders and improve your credit), a shorter term (higher monthly payment but far less lifetime interest), and extra principal payments (every extra dollar removes all the future interest it would have accrued). The mortgage and debt payoff calculators here quantify each lever on your actual numbers.

Question 2

Should I pay off debt or invest?

Accepted Answer

Compare the debt's interest rate to your expected after-tax investment return. Paying off a 20% credit card is a guaranteed 20% return — almost always better than investing. For low-rate debt like a sub-5% mortgage, investing the difference can win over long horizons, especially once inflation erodes the fixed payment. The calculators let you see both sides in real terms.

Question 3

Why does inflation make fixed-rate debt cheaper over time?

Accepted Answer

A fixed loan payment never changes in nominal terms, but inflation lifts prices and wages every year, so the same payment costs you less in real purchasing power as time passes. This is why a long fixed-rate mortgage can act as a partial hedge against inflation — the calculators show the inflation-adjusted lifetime cost, not just the nominal total.

Loans & Debt Calculators

Frequently Asked Questions